Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Auto-increment does not work on Id (primary) column

See original GitHub issue

Hi, When I’m trying to add new entity to database (mariadb 5.5.52). Ef always tries to set Id column (primary key) to 0. I’ve tried to switch to MS SQL and it works fine. Command Update-Database works without any exception.

Pomelo version: 1.1.1 Mariadb: 5.5.52 (centos 7)

dotnet --version
1.0.0

Startup.cs:

public void ConfigureServices(IServiceCollection services)
{
    /* ... */
    services.AddDbContext<DataContext>(options => options.UseMySql(Configuration.GetConnectionString("production"))); 
    /* ... */  

}

Connection string: server=localhost;userid=remote;pwd=password;port=3306;database=db;sslmode=none;

Models:

    public class Select : IHasId
    {
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public int Id { get; set; }

        public string Name { get; set; }

        public List<SelectValue> Values { get; set; }
    }

    public class SelectValue : IHasId
    {
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public int Id { get; set; }

        public string Value { get; set; }
        public string Text { get; set; }

        public override string ToString()
        {
            return Value;
        }
    }

    public interface IHasId
    {
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        int Id { get; set; }
    }

Adding entity:

            context.Selects.Add(new Select()
            {
                Name = "type",
                Values = new List<SelectValue>()
            });

            context.Selects.Add(new Select()
            {
                Name = "composition",
                Values = new List<SelectValue>()
                {
                    new SelectValue()
                    {
                        Value = ""
                    },
                    new SelectValue()
                    {
                        Value = "Val1"
                    },
                    new SelectValue()
                    {
                        Value = "Val2"
                    }
                }
            });

            context.SaveChanges();

Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while updating the entries. See the inner exception for details. ---> MySql.Data.MySqlClient.MySqlException: Duplicate entry '0' for key 'PRIMARY'
         at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
         at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
         at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
         at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable`1.ConfiguredValueTaskAwaiter.GetResult()
         at MySql.Data.MySqlClient.Results.ResultSet.<ReadResultSetHeaderAsync>d__1.MoveNext()
      --- End of stack trace from previous location where exception was thrown ---
         at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
         at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
         at MySql.Data.MySqlClient.MySqlDataReader.<ReadFirstResultSetAsync>d__62.MoveNext()
      --- End of stack trace from previous location where exception was thrown ---
         at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
         at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
         at MySql.Data.MySqlClient.MySqlDataReader.<CreateAsync>d__61.MoveNext()
      --- End of stack trace from previous location where exception was thrown ---
         at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
         at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
         at MySql.Data.MySqlClient.CommandExecutors.TextCommandExecutor.<ExecuteReaderAsync>d__3.MoveNext()
      --- End of stack trace from previous location where exception was thrown ---
         at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
         at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
         at MySql.Data.MySqlClient.MySqlCommand.<ExecuteReaderAsync>d__50.MoveNext()
      --- End of stack trace from previous location where exception was thrown ---
         at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
         at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
         at MySql.Data.MySqlClient.MySqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
         at Microsoft.EntityFrameworkCore.Storage.Internal.MySqlRelationalCommand.<ExecuteAsync>d__3.MoveNext()
      --- End of stack trace from previous location where exception was thrown ---
         at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
         at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
         at Microsoft.EntityFrameworkCore.Storage.Internal.MySqlRelationalCommand.Execute(IRelationalConnection connection, String executeMethod, IReadOnlyDictionary`2 parameterValues, Boolean closeConnection)
         at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteReader(IRelationalConnection connection, IReadOnlyDictionary`2 parameterValues)
         at Microsoft.EntityFrameworkCore.Update.Internal.MySqlModificationCommandBatch.Execute(IRelationalConnection connection)
         --- End of inner exception stack trace ---
         at Microsoft.EntityFrameworkCore.Update.Internal.MySqlModificationCommandBatch.Execute(IRelationalConnection connection)
         at Microsoft.EntityFrameworkCore.Update.Internal.MySqlBatchExecutor.Execute(IEnumerable`1 commandBatches, IRelationalConnection connection)
         at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(IReadOnlyList`1 entriesToSave)
         at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(Boolean acceptAllChangesOnSuccess)
         at Microsoft.EntityFrameworkCore.DbContext.SaveChanges(Boolean acceptAllChangesOnSuccess)
Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while updating the entries. See the inner exception for details. ---> MySql.Data.MySqlClient.MySqlException: Duplicate entry '0' for key 'PRIMARY'
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable`1.ConfiguredValueTaskAwaiter.GetResult()
   at MySql.Data.MySqlClient.Results.ResultSet.<ReadResultSetHeaderAsync>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MySql.Data.MySqlClient.MySqlDataReader.<ReadFirstResultSetAsync>d__62.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MySql.Data.MySqlClient.MySqlDataReader.<CreateAsync>d__61.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MySql.Data.MySqlClient.CommandExecutors.TextCommandExecutor.<ExecuteReaderAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MySql.Data.MySqlClient.MySqlCommand.<ExecuteReaderAsync>d__50.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
   at Microsoft.EntityFrameworkCore.Storage.Internal.MySqlRelationalCommand.<ExecuteAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.EntityFrameworkCore.Storage.Internal.MySqlRelationalCommand.Execute(IRelationalConnection connection, String executeMethod, IReadOnlyDictionary`2 parameterValues, Boolean closeConnection)
   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteReader(IRelationalConnection connection, IReadOnlyDictionary`2 parameterValues)
   at Microsoft.EntityFrameworkCore.Update.Internal.MySqlModificationCommandBatch.Execute(IRelationalConnection connection)
   --- End of inner exception stack trace ---
   at Microsoft.EntityFrameworkCore.Update.Internal.MySqlModificationCommandBatch.Execute(IRelationalConnection connection)
   at Microsoft.EntityFrameworkCore.Update.Internal.MySqlBatchExecutor.Execute(IEnumerable`1 commandBatches, IRelationalConnection connection)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(IReadOnlyList`1 entriesToSave)
   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChanges(Boolean acceptAllChangesOnSuccess)
   at Microsoft.EntityFrameworkCore.DbContext.SaveChanges(Boolean acceptAllChangesOnSuccess)

Issue Analytics

State:
Created 7 years ago
Comments:30 (5 by maintainers)

Top GitHub Comments

7reactions

chikien276commented, Aug 26, 2017

I have noticed in my code have this

migrationBuilder.CreateTable(
                name: "Select",
                columns: table => new
                {
                    Id = table.Column<int>(nullable: false)
                        .Annotation("MySQL:AutoIncrement", true),
                    Name = table.Column<string>(nullable: true)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Select", x => x.Id);
                });

this line .Annotation("MySQL:AutoIncrement", true), causes the script generated without the auto_increment on primary key So I had to change to .Annotation("MySql:ValueGeneratedOnAdd", true), Every thing work like charm

3reactions

caleblloydcommented, Aug 29, 2017

@Kagamine @Yakkuru @deepak-khopade-isdr this is being fixed in #371 and will be available in the next 2.0.0-rtm release sometime tonight or tomorrow

Top Results From Across the Web

Primary key auto_increment not working on MYSQL [closed]

For now your query is trying to insert a two columns data value into a three columns table. INSERT INTO people is similar...

MySQL: Why is auto_increment limited to just primary keys?

I know MySQL limits auto_increment columns to primary keys. Why is this? My first thought is that it's a performance restriction, since there ......

3.6.9 Using AUTO_INCREMENT

The AUTO_INCREMENT attribute can be used to generate a unique identity for new rows: CREATE TABLE animals ( id MEDIUMINT NOT NULL AUTO_INCREMENT, ......

AUTO_INCREMENT - MariaDB Knowledge Base

Each table can have only one AUTO_INCREMENT column. It must defined as a key (not necessarily the PRIMARY KEY or UNIQUE key).

Bug when set an existing column as auto increment ...

The issue comes into play when trying to create a column with auto inc and as a primary key. The bug seems to...